Cleanup and refactoring; fixed docker-compose setup

Author: olesho

.gitignore

@@ -60,4 +60,11 @@ chromium-data/
 browser-operator-core/devtools-frontend/
 browser-operator-core/depot_tools/
 browser-operator-core/.devtools-built
-browser-operator-core/.devtools-base-built
+browser-operator-core/.devtools-base-built
+
+# Eval server runtime files
+eval-server/nodejs/clients/
+eval-server/nodejs/logs/
+
+# Evaluation screenshots
+evals/screenshots/